/Engine/Source/Runtime/Navmesh/Public/Detour/DetourNavMesh.h
This function will not fail if the tiles array is too small to hold the entire result set. It will simply fill the array to capacity.
The number of tiles returned in the tiles array.
int getTilesAt ( const int x, const int y, [dtMeshTile](API\Runtime\Navmesh\Detour\dtMeshTile) const ** tiles, const int maxTiles ) const